echinacea

noun

1. any of several coneflowers of the genus Echinacea whose leaves, roots, and other parts are used in herbal medicine to promote wound healing and enhance the immune system.

noun

1. Also called: purple coneflower either of the two N American plants of the genus Echinacea, having flower heads with purple rays and black centres: family Compositae (composites)See coneflower
2. the powdered root of either of these plants, used to stimulate the immune system